题解 | #单词倒排#

#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    string s;
    getline(cin, s);

    vector<string> ans;
    bool isWord = false;
    string w;
    for (int i = s.size() - 1; i >= 0; i--) {
        if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z')) {
            w = s[i] + w;
        } else {
            if (w.size() != 0) {
                ans.push_back(w);
                w.clear();
            }
        }
    }
    if (w.size() != 0) {
        ans.push_back(w);
        w.clear();
    }

    for (auto i : ans) {
        cout << i << ' ';
    }
}
// 64 位输出请用 printf("%lld")